Latitude lines are parallel to the Equator
(by definition the Equator lies at 0.0 degrees). Latitude
lines run from the Equator up to +90.0 degrees North of the Equator (North
Pole), and -90.0 degrees South of the Equator (South Pole).

Longitude

Lines of Longitude (Meridians) run from zero
degrees at the Greenwich Prime Meridian to +180 degrees East and -180.0
degrees West.